5: \(\left(5-x\right)\left(2x+10\right)>0\)
\(\Leftrightarrow\left(x-5\right)\left(x+5\right)< 0\)
\(\Leftrightarrow-5< x< 5\)
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5: \(\left(5-x\right)\left(2x+10\right)>0\)
\(\Leftrightarrow\left(x-5\right)\left(x+5\right)< 0\)
\(\Leftrightarrow-5< x< 5\)